In an earlier statement, Sky apologised for the "language used" by Strauss.

BBC Radio 5 live's Pat Murphy said: "We understand he thought he was off air but the comments were broadcast in Australia. Apparently during an advert break, Strauss was talking to Nick Knight, his co-commentator, and he referred to Pietersen in very derogatory terms."

Strauss, 37, was captain of England when Pietersen was dropped for sending derogatory text messages about his team-mates - and Strauss in particular - to members of the South Africa team in 2012.

Kevin Pietersen (left) and Andrew Strauss celebrate winning a Test series against India in 2011

Strauss retired shortly after that controversy and Pietersen was eventually brought back into the fold.